Early in $2009,$ an addition to the building was constructed at a cost of $$535,000.$ At that time, it was estimated that the remaining life

of the building would be$,$ as originally estimated, an additional $30$ years, and that the addition would have a life of $30$ years and a

salvage value of $$21,400.$

In $2027,$ it is determined that the probable life of the building and addition will extend to the end of $2058,$ or $20$ years beyond the

original estimate.